Cervical part of thoracic duct

On the thoracic superior outlet, the cervical part of thoracic duct forms an arch and terminates at the left venous angle, where the left internal jugular vein and the left subclavian vein converge. However, there is significant anatomical variability in its termination. The most common termination site is the left venous angle, but it can also terminate at the internal jugular vein or the subclavian vein. The duct may end as a single vessel in most cases, but it can also divide into multiple branches before termination.